Dataset from A Phase III, Randomised, Double-blind, Placebo-controlled, Parallel Group Study of Six Months Treatment With Ropinirole CR as Adjunctive Therapy in Patients With Parkinson's Disease Who Are Not Optimally Controlled on L-dopa

The purpose of this double-blind, placebo controlled study is to evaluate the safety and effectiveness of an investigational Parkinson's disease drug in patients with advanced disease who are not well-controlled on their L-dopa medication.